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I need some help, please. I use an ATI Mobility Radeon HD 6370 with proprietary drivers v11.8 in Ubuntu 11.10 64 bit and I can't get it to detect an external monitor through HDMI. Not with the Catalyst software nor with the "Displays" utility. I just want to set up a simple and straight forward clone display configuration to see my laptop output on my HD TV monitor. I can do this without any trouble in Windows 7 (same machine, dual boot) so I know there's nothing wrong with my hardware (laptop, cable or TV monitor).

I'm not sure what is going wrong here, but if it has anything to do with this, I can tell you that I have an xorg.conf file generated by

Apparently there are two adapters detected. The information section in the Catalyst GUI confirms this, however, the display manager only lists the 4200 adapter.
I thought I could sort this out with a new xorg.conf file generated by aticonfig --initial -f --adapter=all but that only resulted in X server failing to load at startup. I only got it working again by restoring the previous configuration.